nrf51422 goes in to WFE

RE: nrf51422 goes in to WFE

Vidar Berg — Fri, 04 Dec 2015 12:26:10 GMT

Reading the stack pointer was merely a way of checking if the application was programmed to the chip, and it seems like it wasn't(?) You could have read any address in the application region to do this check, but thought it was easiest to check the stack pointer in the vector table as it's always set to something.

RE: nrf51422 goes in to WFE

marcinioski — Wed, 02 Dec 2015 21:31:52 GMT

Thanks for reply,

Here is output of above command:

J-Link>mem32 0x1D000 1
0001D000 = FFFFFFFF

I do not know what do you mean by initial stack pointer. Is it defined somewhere? In gcc linker script exist:

__StackLimit = __StackTop - SIZEOF(.stack_dummy)

Is it the same?

Is there any way to check inside JLink(I am not familiar with it) from which function nrf51 start If even gdb breakpoint on _start function is not triggered?

=====UPDATE===== Ok, it started working. Thanks for help!

RE: nrf51422 goes in to WFE

Vidar Berg — Wed, 02 Dec 2015 13:17:42 GMT

I got the same result when I erased the application and only had the SD programmed. Please try the following in Jlink commander to verify that the application vector table is present at 0x1D000:

jlink > mem32 0x1D000 1 // check if it returns the initial stack pointer.